One vertex per element, one color per generator, with an edge from x to x·s.
(10,13)(11,14)(15,16)(17,18)(19,25)(20,23)(21,24)(22,27)(26,31)(28,30)(29,32) involution — undirected(1,2,5,8)(3,7,4,6)(9,10,12,13)(11,14,15,16)(17,19)(18,22)(20,26)(21,27)(23,29)(24,25)(28,32)(30,31)(1,3,5,4)(2,6,8,7)(9,11,12,15)(10,14,13,16)(17,20,21,28)(18,23,24,30)(19,26,27,32)(22,29,25,31)(9,10,12,13)(11,14,15,16)(18,24)(22,25)(23,30)(29,31)(1,4,5,3)(2,7,8,6)(11,15)(14,16)(19,27)(22,25)(26,32)(29,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.